A-LevelChemistryHalogen derivativesOct/Nov 2016Paper 1 Q221 Mark
The reaction CH₃CH₂CH₂CH₂Br + OH⁻ → CH₃CH₂CH₂CH₂OH + Br⁻ proceeds via an SN2 mechanism. The reaction (CH₃)₃CBr + OH⁻ → (CH₃)₃COH + Br⁻ proceeds via an SN1 mechanism. Which statement about these two reactions is correct?
ABoth reactions involve homolytic bond fission.
BBoth reactions involve hydroxide ions acting as electron pair donors.
CBoth reactions involve the formation of a positively-charged intermediate.
DBoth reactions occur in a single step.
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of halogen derivatives within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep